Hey, i got my final GCSE maths test (non calc) which starts in around 1 and a half hours!
I don't get this question:
EDIT: HERE IS THE GRAPH. SORRY IN A RUSH AND FORGOT LOL.
A, B, C and D are points on the circumference of a circle, centre P.
AC is the diameter of the circle.
Angle DAC = 20°
(a) Find the size of angle ACD
(b) Find the size of angle DBC
Give a reason for your answer